Christ in the Psalms by Patrick Reardon devotes a page or two to each psalm. In his commentary on Psalm 4, Fr. Reardon writes, "The Psalter has nothing to say to the worldly; it is not for the unconverted, the unrepentant. It is, rather, the prayer book of those who strive for holiness of life and the unceasing praise of God." Christ in the Gospels has been called "Brilliant!" "A great reference book" "Nothing less than outstanding" in understanding the psalms and deepening their meaning.
The psalms are not included in this book but can be purchased separately on this link.